Nonparametric Quantile Regression Estimation With Mixed Discrete and Continuous Data

Degui Li, Qi Li and Zheng Li

Journal of Business & Economic Statistics, 2021, vol. 39, issue 3, 741-756

Abstract: In this article, we investigate the problem of nonparametrically estimating a conditional quantile function with mixed discrete and continuous covariates. A local linear smoothing technique combining both continuous and discrete kernel functions is introduced to estimate the conditional quantile function. We propose using a fully data-driven cross-validation approach to choose the bandwidths, and further derive the asymptotic optimality theory. In addition, we also establish the asymptotic distribution and uniform consistency (with convergence rates) for the local linear conditional quantile estimators with the data-dependent optimal bandwidths. Simulations show that the proposed approach compares well with some existing methods. Finally, an empirical application with the data taken from the IMDb website is presented to analyze the relationship between box office revenues and online rating scores. Supplementary materials for this article are available online.

Date: 2021
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Citations: View citations in EconPapers (3)

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DOI: 10.1080/07350015.2020.1730856

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